4
Possible Causes
Corrective Action
Jack will not lift load
Jack bleeds off after lift
Will not lift to full extension
Release valve not tightly closed
Overload condition
Fluid level low
Fluid level low
Air trapped in system
Release valve not tightly closed
Overload condition
Hydraulic unit malfunction
Ensure release valve tightly closed
Remedy overload condition
Ensure release valve tightly closed
Remedy overload condition
Ensure proper fluid level
Ensure proper fluid level
With ram fully retracted, remove oil filler
plug to let pressurized air escape, then
reinstall oil filler plug
Poor lift performance
Jack will not lower after unloading
Reservoir overfilled
Linkages binding
Drain fluid to proper level
Clean and lubricate moving parts
Symptom
TROUBLESHOOTING
MAINTENANCE
Important: Use only a good grade hydraulic jack oil. Avoid
mixing different types of fluid and
NEVER
use brake fluid,
turbine oil, transmission fluid, motor oil or glycerin.
Improper fluid can cause premature failure of the jack
and the potential for sudden and immediate loss of load.
We recommend Mobil DTE 13M or equivalent.
Adding oil
1. With saddle fully lowered, set jack in its upright,
level position. Remove oil filler plug/ screw.
2. Fill until oil is level with the oil filler hole, reinstall oil
filler plug/ screw.
Changing oil
For best performance and longest life, replace the
complete fluid supply at least once per year.
1. With saddle fully lowered, set jack in its upright,
level position. Remove the oil filler plug/ screw.
2. Lay the jack on its side and drain the fluid into a
suitable container.
Note:
Dispose of hydraulic fluid in accordance with
local regulations.
3. Set jack in its level upright position.
4. Fill with oil until just below the rim of oil filler hole.
5. Reinstall oil filler plug/ screw.
Lubrication
A periodic coating of light lubricating oil to pivot points,
axles and hinges will help to prevent rust and assure
that wheels, casters and pump assemblies move freely.
Cleaning
Periodically check the ram for signs of rust or
corrosion. Clean as needed and wipe with an oily
cloth.
Note:
Never use sandpaper or abrasive material on
these surfaces!
Storage
When not in use, store the jack with pump piston and
saddle in lowest position.
REPLACEMENT PARTS
Not all components of the jack are replacement items,
but are illustrated as a convenient reference of location
and position in the assembly sequence. When ordering
parts, give model number, part number and the de-
scription on page 5 thru 7. Call your distrubutor for
current pricing.
